RR Lyrae in the inner Galaxy

At the last group meeting we discussed several issues revolving around RRL in the galaxy. a) Maddie Lucey's paper: she did the selection function using the Rybizki and Drimmel trick. Do we have to do it a la Cantat-Gauding, with the VIVACE and DES as the 'ground-truth' sample b) the poor old heart and RRL. The Vivace sample shows a tight know of RRL at the very center. The distance modulus spread (after extinction correction) is only sigma = 0.25mag. Or 12% of 1.0 kpc at 8.1 kpc. Plan: do light-curved based metallicities and get the spatial structure...